chore(deps-dev): bump gh-pages from 2.0.1 to 2.1.1 (#50)

Bumps [gh-pages](https://github.com/tschaub/gh-pages) from 2.0.1 to 2.1.1.
- [Release notes](https://github.com/tschaub/gh-pages/releases)
- [Changelog](https://github.com/tschaub/gh-pages/blob/master/changelog.md)
- [Commits](tschaub/gh-pages@v2.0.1...v2.1.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

yarn.lock

@@ -5380,9 +5380,9 @@ getpass@^0.1.1:
     assert-plus "^1.0.0"
 
 gh-pages@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/gh-pages/-/gh-pages-2.0.1.tgz#aefe47a43b8d9d2aa3130576b33fe95641e29a2f"
-  integrity sha512-uFlk3bukljeiWKQ2XvPfjcSi/ou7IfoDf2p+Fj672saLAr8bnOdFVqI/JSgrSgInKpCg5BksxEwGUl++dbg8Dg==
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/gh-pages/-/gh-pages-2.1.1.tgz#5be70a92f9cb70404bafabd8bb149c0e9a8c264b"
+  integrity sha512-yNW2SFp9xGRP/8Sk2WXuLI/Gn92oOL4HBgudn6PsqAnuWT90Y1tozJoTfX1WdrDSW5Rb90kLVOf5mm9KJ/2fDw==
   dependencies:
     async "^2.6.1"
     commander "^2.18.0"